The Mastervolt ChargeMaster battery charger is designed to help batteries perform better and last longer, providing fast and complete charging wherever you are. The internal metal to metal connections are all equipped with strain relief to prevent damage from corrosion or overheating, ensuring long life and less chance of failure. Even without the batteries connected, the ChargeMaster can provide a reliable DC output to power lights or keep the fridge cold!

The 3-STEP+ charging memory ensures more power and a longer life for your batteries, and will even charge depleted batteries. The ChargeMaster is suitable for all types of battery, and also has a wide input voltage range, which ensures perfect automatic operation anywhere in the world. It also has a built in memory function, so batteries will not get overcharged even if the mains supply is unreliable. It is also MasterBus compatible, meaning they can be connected easily to a MasterBus system where you can operate and monitor all Mastervolt devices in one panel.

General specifications

Nominal output voltage: 24V

Total charge current: 30 A at 28.8V

Number of battery outlets: 3

Charge current second output: 30A

Charge current third output: 30A

Battery bank size: 60-300 Ah

Nominal input voltage: 120/230V (90-265V), 50/60 Hz

AC connection: connector strips

Power supply mode: yes

Galvanic isolation: yes

Display/read-out: LED display

Fastening: mounting bracket (included) or 4x screw

Dimensions, Height: 291mm (11.5"), Width: 210mm (8.3"), Depth: 131mm (5.2")

Weight: 4 kg (8.8 lb)

Compliance: CE, ABYC A-31, SAE J1171/ISO 8846 ignition protected, RMRS, RRR

Optional: Quick Connect (OEM) version with WAGO 770-113 connector and 25 cm cable, product code 44020302

Technical specifications

Charge characteristic: IUoUo, automatic 3-step+ for gel/AGM/wet/Lithium Ion

Charge voltage Bulk: 28.8V

Charge voltage Absorption: 28.5V

Absorption time: 4 hours

Charge voltage Float (wet batteries): 26.5V

Charge voltage Float (Gel/AGM batteries): 27.6V

Temperature compensation: yes

DC voltage compensation: automatic

Power consumption (DC side): 2.5 mA

Full load consumption (230V AC): 925 W

Current Control function: yes, through MasterBus

Power factor control: ? 0.98

Temperature range (ambient temp.): -25°C to 60°C, derating 0°C and > 40°C (-13°F to 140°F)

Cooling: vario fan

Protection degree: IP23

Protections: over temperature, over load, short circuit, high/low battery voltage

MasterBus compatible: yes